Build errors when upgrading from CUDA7.5 to CUDA8.0

Firstly, I apologize if this is not the most appropriate sub forum for this post.

I am using Win7 VS2012 and CUDA8.0 with compute_30,sm_30 specified for my build.
The solution is building fine with CUDA 7.5, but when I change it to CUDA 8.0 I get the error:
error MSB4057: The target “CudaBuildCore” does not exist in the project.